Quick Test: Facebook vs. Twitter

Just posted a link that I shortend with two seperate shortening services to Kiva's Facebook and Twitter accounts. Found some interesting stats, and wanted to post them quickly before going back and writing a full post.
Here are the stats after two days:

Given that our Twitter account has around 5k followers and our Facebook account has 42k fans, I was surprised how many clicks that I got from Twitter. I've already run more "serious" tests and I'll post the results.